IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v14y2023i1d10.1038_s41467-023-38197-y.html
   My bibliography  Save this article

Confining donor conformation distributions for efficient thermally activated delayed fluorescence with fast spin-flipping

Author

Listed:
  • Weidong Qiu

    (South China University of Technology)

  • Denghui Liu

    (South China University of Technology)

  • Mengke Li

    (South China University of Technology)

  • Xinyi Cai

    (South China University of Technology)

  • Zijian Chen

    (South China University of Technology)

  • Yanmei He

    (South China University of Technology)

  • Baoyan Liang

    (Ji Hua Laboratory)

  • Xiaomei Peng

    (South China University of Technology)

  • Zhenyang Qiao

    (South China University of Technology)

  • Jiting Chen

    (South China University of Technology)

  • Wei Li

    (South China University of Technology)

  • Junrong Pu

    (South China University of Technology)

  • Wentao Xie

    (South China University of Technology)

  • Zhiheng Wang

    (South China University of Technology
    Ji Hua Laboratory)

  • Deli Li

    (South China University of Technology)

  • Yiyang Gan

    (South China University of Technology)

  • Yihang Jiao

    (South China University of Technology)

  • Qing Gu

    (South China University of Technology)

  • Shi-Jian Su

    (South China University of Technology)

Abstract

Fast spin-flipping is the key to exploit the triplet excitons in thermally activated delayed fluorescence based organic light-emitting diodes toward high efficiency, low efficiency roll-off and long operating lifetime. In common donor-acceptor type thermally activated delayed fluorescence molecules, the distribution of dihedral angles in the film state would have significant influence on the photo-physical properties, which are usually neglected by researches. Herein, we find that the excited state lifetimes of thermally activated delayed fluorescence emitters are subjected to conformation distributions in the host-guest system. Acridine-type flexible donors have a broad conformation distribution or bimodal distribution, in which some conformers feature large singlet-triplet energy gap, leading to long excited state lifetime. Utilization of rigid donors with steric hindrance can restrict the conformation distributions in the film to achieve degenerate singlet and triplet states, which is beneficial to efficient reverse intersystem crossing. Based on this principle, three prototype thermally activated delayed fluorescence emitters with confined conformation distributions are developed, achieving high reverse intersystem crossing rate constants greater than 106 s−1, which enable highly efficient solution-processed organic light-emitting diodes with suppressed efficiency roll-off.

Suggested Citation

  • Weidong Qiu & Denghui Liu & Mengke Li & Xinyi Cai & Zijian Chen & Yanmei He & Baoyan Liang & Xiaomei Peng & Zhenyang Qiao & Jiting Chen & Wei Li & Junrong Pu & Wentao Xie & Zhiheng Wang & Deli Li & Yi, 2023. "Confining donor conformation distributions for efficient thermally activated delayed fluorescence with fast spin-flipping," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38197-y
    DOI: 10.1038/s41467-023-38197-y
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-023-38197-y
    File Function: Abstract
    Download Restriction: no

    File URL: https://libkey.io/10.1038/s41467-023-38197-y?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    References listed on IDEAS

    as
    1. Naoya Aizawa & Yu Harabuchi & Satoshi Maeda & Yong-Jin Pu, 2020. "Kinetic prediction of reverse intersystem crossing in organic donor–acceptor molecules," Nature Communications, Nature, vol. 11(1), pages 1-6, December.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Junki Ochi & Yuki Yamasaki & Kojiro Tanaka & Yasuhiro Kondo & Kohei Isayama & Susumu Oda & Masakazu Kondo & Takuji Hatakeyama, 2024. "Highly efficient multi-resonance thermally activated delayed fluorescence material toward a BT.2020 deep-blue emitter," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. Hyung Suk Kim & Sang Hoon Lee & Seunghyup Yoo & Chihaya Adachi, 2024. "Understanding of complex spin up-conversion processes in charge-transfer-type organic molecules," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38197-y. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.